loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): orphan cleanup on readonly fs ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc2-syzkaller-00857-gdf28e8690e71 #0 Not tainted ------------------------------------------------------ syz-executor.0/5845 is trying to acquire lock: ffff888075339768 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x57/0x510 fs/quota/dquot.c:479 but task is already holding lock: ffff88807018a0a0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x97d/0x1150 fs/ext4/inode.c:4337 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}-{3:3}: lock_acquire+0x1dd/0x520 kernel/locking/lockdep.c:5669 down_read+0x39/0x50 kernel/locking/rwsem.c:1520 ext4_map_blocks+0x38a/0x1ce0 fs/ext4/inode.c:574 ext4_getblk+0x1eb/0x7c0 fs/ext4/inode.c:863 ext4_bread+0x2a/0x170 fs/ext4/inode.c:919 ext4_quota_write+0x21e/0x570 fs/ext4/super.c:7135 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x336/0x690 fs/quota/quota_tree.c:130 do_insert_tree+0x261/0x1a50 fs/quota/quota_tree.c:340 do_insert_tree+0x70b/0x1a50 fs/quota/quota_tree.c:375 dq_insert_tree fs/quota/quota_tree.c:401 [inline] qtree_write_dquot+0x3b9/0x530 fs/quota/quota_tree.c:420 v2_write_dquot+0x11c/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x34d/0x680 fs/quota/dquot.c:444 ext4_acquire_dquot+0x2e2/0x400 fs/ext4/super.c:6770 dqget+0x98b/0xdb0 fs/quota/dquot.c:914 __dquot_initialize+0x2d9/0xe10 fs/quota/dquot.c:1492 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb1d/0x13c0 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x8235/0x8990 fs/ext4/super.c:5637 get_tree_bdev+0x3fe/0x620 fs/super.c:1294 vfs_get_tree+0x88/0x270 fs/super.c:1501 do_new_mount+0x28b/0xad0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: lock_acquire+0x1dd/0x520 kernel/locking/lockdep.c:5669 down_read+0x39/0x50 kernel/locking/rwsem.c:1520 v2_read_dquot+0x4a/0x100 fs/quota/quota_v2.c:332 dquot_acquire+0x188/0x680 fs/quota/dquot.c:435 ext4_acquire_dquot+0x2e2/0x400 fs/ext4/super.c:6770 dqget+0x98b/0xdb0 fs/quota/dquot.c:914 __dquot_initialize+0x2d9/0xe10 fs/quota/dquot.c:1492 ext4_process_orphan+0x57/0x2d0 fs/ext4/orphan.c:329 ext4_orphan_cleanup+0xb1d/0x13c0 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x8235/0x8990 fs/ext4/super.c:5637 get_tree_bdev+0x3fe/0x620 fs/super.c:1294 vfs_get_tree+0x88/0x270 fs/super.c:1501 do_new_mount+0x28b/0xad0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1dd/0x520 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 dquot_commit+0x57/0x510 fs/quota/dquot.c:479 ext4_write_dquot+0x1ee/0x2b0 fs/ext4/super.c:6754 mark_dquot_dirty fs/quota/dquot.c:346 [inline] mark_all_dquot_dirty fs/quota/dquot.c:384 [inline] __dquot_free_space+0x9a0/0xfc0 fs/quota/dquot.c:1907 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6044 [inline] ext4_free_blocks+0x1e9f/0x2dc0 fs/ext4/mballoc.c:6173 ext4_remove_blocks fs/ext4/extents.c:2545 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline] ext4_ext_remove_space+0x216a/0x4d70 fs/ext4/extents.c:2958 ext4_ext_truncate+0x172/0x210 fs/ext4/extents.c:4416 ext4_truncate+0xa06/0x1150 fs/ext4/inode.c:4342 ext4_evict_inode+0xb8a/0x10f0 fs/ext4/inode.c:286 evict+0x2a4/0x620 fs/inode.c:665 ext4_orphan_cleanup+0xb1d/0x13c0 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x8235/0x8990 fs/ext4/super.c:5637 get_tree_bdev+0x3fe/0x620 fs/super.c:1294 vfs_get_tree+0x88/0x270 fs/super.c:1501 do_new_mount+0x28b/0xad0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/2); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); lock(&dquot->dq_lock); *** DEADLOCK *** 4 locks held by syz-executor.0/5845: #0: ffff88802377a0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228 #1: ffff88802377a650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1477 [inline] #1: ffff88802377a650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1599 [inline] #1: ffff88802377a650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x457/0x10f0 fs/ext4/inode.c:240 #2: ffff88807018a0a0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x97d/0x1150 fs/ext4/inode.c:4337 #3: ffffffff8d26b348 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:326 stack backtrace: CPU: 0 PID: 5845 Comm: syz-executor.0 Not tainted 6.3.0-rc2-syzkaller-00857-gdf28e8690e71 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain+0x1667/0x58e0 kernel/locking/lockdep.c:3832 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1dd/0x520 kernel/locking/lockdep.c:5669 __mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 dquot_commit+0x57/0x510 fs/quota/dquot.c:479 ext4_write_dquot+0x1ee/0x2b0 fs/ext4/super.c:6754 mark_dquot_dirty fs/quota/dquot.c:346 [inline] mark_all_dquot_dirty fs/quota/dquot.c:384 [inline] __dquot_free_space+0x9a0/0xfc0 fs/quota/dquot.c:1907 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline] dquot_free_space include/linux/quotaops.h:384 [inline] dquot_free_block include/linux/quotaops.h:395 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6044 [inline] ext4_free_blocks+0x1e9f/0x2dc0 fs/ext4/mballoc.c:6173 ext4_remove_blocks fs/ext4/extents.c:2545 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline] ext4_ext_remove_space+0x216a/0x4d70 fs/ext4/extents.c:2958 ext4_ext_truncate+0x172/0x210 fs/ext4/extents.c:4416 ext4_truncate+0xa06/0x1150 fs/ext4/inode.c:4342 ext4_evict_inode+0xb8a/0x10f0 fs/ext4/inode.c:286 evict+0x2a4/0x620 fs/inode.c:665 ext4_orphan_cleanup+0xb1d/0x13c0 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5509 [inline] ext4_fill_super+0x8235/0x8990 fs/ext4/super.c:5637 get_tree_bdev+0x3fe/0x620 fs/super.c:1294 vfs_get_tree+0x88/0x270 fs/super.c:1501 do_new_mount+0x28b/0xad0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f50d647e05a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f50d715dee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f50d715df80 RCX: 00007f50d647e05a RDX: 0000000020000040 RSI: 0000000020000500 RDI: 00007f50d715df40 RBP: 0000000020000040 R08: 00007f50d715df80 R09: 0000000000004509 R10: 0000000000004509 R11: 0000000000000246 R12: 0000000020000500 R13: 00007f50d715df40 R14: 00000000000004b4 R15: 000000000000002c EXT4-fs (loop0): 1 orphan inode deleted